Table 4. Pair-wise comparison of surface roughness parameters before and after the instrumentation by paired-samples t-test.
| Location | NiTi instrument | Comparison of SR values before and after instrumentation a | ||
|---|---|---|---|---|
| Abbreviations: NiTi, nickel titanium; PTG, ProTaper Gold; PTN, ProTaper Next; Sa, average surface roughness value; Sq, root mean square roughness; SR,
surface roughness; Sz, peak to valley height; WOG, WaveOne Gold. a The comparison is significant at the p ≤ 0.05 level. | ||||
| Blade | Sq | Sa | Sz | |
| PTN | 0.012 | 0.031 | 0.051 | |
| WOG | 0.001 | 0.000 | 0.000 | |
| Flute | PTG | 0.116 | 0.049 | 0.008 |
| PTN | 0.006 | 0.036 | 0.001 | |
| WOG | 0.022 | 0.351 | 0.222 | |